I gotta say, the handguard looks interesting for two reasons:Easy if you wanted to make an integrally suppressed looking rifleAppears to have the hole for the standard G36 bipod, although I think the bipod would be too long.

so the RS one takes a 7.62x37mm round? will that result in different mags (I can see that the pictured one is shorter) would the different RS round result in a different length/width mag and would airsoft manufacturers even bother making a different mag (other than the shorter one) if that were so.

"Power may justly be compared to a great river which, while kept within its due bounds is both beautiful and useful; but when it overflows its banks, it is then too impetuous to be stemmed, it bears down on all before it and brings destruction and desolation wherever it comes.”- Andrew HamiltonA&K Mk43 MOD0JG T3-SAS-GWE M1911